I'm only mining at 3.9 Mhash/s. What am I doing wrong? Does it have to do with the device I'm using? I'm currently on [0-0] Intel(R) HD Graphics 4000, but I can also choose [0-1] Intel(R) Core(TM) i3-3217 and [1-0] GeForce GT 720 M. Which one should I pick? Any other tips for a beginner?
Thank you!

Hey. I just started BitCoin yesterday for fun and I have som questions:

*Does BitCoin still work?

*What can you actually do for the "BitCoins"?

*How exactly does BitCoin work? Where does the money come from? Etc.

*How much have you guys made out of BitCoin? Is it just a hobby?

Thank you!